Chemical reactions of the elementsReaction of holmium with airHolmium metal tarnishes slowly in air and burns readily to form holmium (III) oxide, Ho2O3. 4Ho + 3O2 → 2Ho2O3 Reaction of holmium with waterThe silvery white metal holmium is quite electropositive and reacts slowly with cold water and quite quickly with hot water to form holmium hydroxide, Ho(OH)3, and hydrogen gas (H2). 2Ho(s) + 6H2O(g) → 2Ho(OH)3(aq) + 3H2(g) Reaction of holmium with the halogensHolmium metal reacts with all the halogens to form holmium(III) halides. So, it reacts with fluorine, F2, chlorine, Cl2, bromine, I2, and iodine, I2, to form respectively holmium(III) bromide, HoF3, holmium(III) chloride, HoCl3, holmium(III) bromide, HoBr3, and holmium(III) iodide, HoI3. 2Ho(s) + 3F2(g) → 2HoF3(s) [pink] 2Ho(s) + 3Cl2(g) → 2HoCl3(s) [yellow] 2Ho(s) + 3Br2(g) → 2HoBr3(s) [yellow] 2Ho(s) + 3I2(g) → 2HoI3(s) [yellow] Reaction of holmium with acidsHolmium metal dissolves readily in dilute sulphuric acid to form solutions containing the yellow aquated Ho(III) ion together with hydrogen gas, H2. It is quite likely that Ho3+(aq) exists as largely the complex ion [Ho(OH2)9]3+ 2Ho(s) + 3H2SO4(aq) → 2Ho3+(aq) + 3SO42-(aq) + 3H2(g) Reaction of holmium with basesWebElements ShopWebElements now has a WebElements shop at which you can buy periodic table posters, mugs, T-shirts, games, molecular models, and more.
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